> Editorial Note: I’m Lauren Ro, and I write furniture buying guides. The picks here are judged on the specs that predict how a piece ages — frame joinery, foam density, and load ratings — checked against BIFMA and FSC certifications plus aggregated owner reports.
A dripping bathroom faucet almost never means the whole fixture is shot. Nine times out of ten it’s a worn cartridge, washer, or O-ring, a part that costs a few dollars and takes twenty minutes to swap. The trick is reading where the leak comes from before you touch a wrench. For related bathroom projects, these guides help: why does my bathroom faucet drip, best bathroom faucet brushed nickel, vanity bathroom, bathroom cabinets, bathroom organizer, and half bathroom ideas.
Fix 1: The Drip From the Spout (Worn Cartridge or Washer)
Shut off the water first, always, because working on a live line floods the vanity in seconds. Turn the two supply valves under the sink clockwise, then open the faucet to drain the line and confirm the flow stops. Plug the drain with a rag so a dropped screw can’t vanish down it.
A steady drip from the spout tip after you’ve shut the handle points to the cartridge or washer inside. On a single-handle faucet that’s a cartridge; on a two-handle faucet it’s usually a rubber washer or seat inside each handle. Pop the decorative cap off the handle, remove the screw beneath, and pull the handle free.
Pull the old cartridge or washer and match it exactly at the store, since a near-match leaks worse than the original. Take the part with you. Many Delta two-handle faucets use the RP25513 stem, for example, so bringing the piece removes the guesswork.
A single dripping faucet wastes more than most people expect. At one drip per second, that’s over 3,000 gallons a year down the drain, so a 20-minute fix pays for itself fast. Seat the new washer or cartridge with a light coat of plumber’s grease and hand-tighten before the final snug, then run the tap 30 seconds and watch the spout.
Fix 2: The Leak at the Base (O-Ring or Loose Packing Nut)
Water pooling around the base of the spout while it runs is a different fault from a spout drip. That’s a worn O-ring on the faucet body or a loose packing nut, not the cartridge. Wiping it dry and watching where the bead reappears tells you which.
Tighten the packing nut a quarter turn with an adjustable wrench before replacing anything, since a slightly loose nut mimics a failed seal. If the leak persists, disassemble and roll the old O-rings off the valve stem. Coat the new rings in plumber’s grease so they seat without tearing.
Reassemble in reverse order and hand-tighten before the final wrench snug, because overtightening cracks the packing nut or crushes the new O-ring. Turn the supply valves back on slowly and watch the base for 30 seconds. A leak that returns immediately means the ring didn’t seat.
Fix 3: When Replacement Beats Repair
Replace the whole faucet when the body is cracked, the finish is corroding through, or parts are simply unavailable, because pouring money into a 15-year-old fixture rarely pays off. A faucet older than a decade often has seized nuts that snap during a repair anyway. Weigh the $8 part against a $40 fixture honestly.
Measure your setup before buying a replacement: count the mounting holes in the sink or countertop and note the spread between them. A single-hole faucet won’t fit a three-hole vanity without a deck plate. Standard three-hole vanities are drilled on 4-inch centerset or 8-inch widespread spacing, so measure between the outer holes before you order. Match the hole count and configuration first, style second.
Swapping a faucet is a basement-under-the-sink job: disconnect the supply lines, loosen the mounting nuts from below, lift the old unit out, and set the new one on a fresh bead of plumber’s putty or the included gasket. Budget an hour for a first-timer working in a tight cabinet.
What You’ll Need
These are repair and replacement options ranked by owner rating: the cartridge stem for a targeted fix, and full faucets for when the fixture is past saving. Start with the replacement stem if your faucet just drips, since that’s the cheapest path. Match any full faucet to your existing hole count.
The EMBATHER single-handle faucet leads at a 4.8 rating, with the second EMBATHER single-hole faucet at 4.6 and a third single-hole faucet at 4.5 rounding out the drop-in replacements. The REHUH pick at 4.5 is the odd one out and the most useful for an actual repair: its title lists an RP25513 stem replacement for Delta two-handle cartridges in a 2-pack, so it’s the fix, not a new fixture. The BELZ faucet at 4.2 is the lowest here, and that band usually signals unit-to-unit variation, so inspect the finish and threads on arrival.
Frequently Asked Questions
Why is my bathroom faucet dripping?
Almost always a worn internal part: a cartridge on a single-handle faucet, or a rubber washer and seat on a two-handle one. Water pooling at the base instead means a failed O-ring, not the cartridge.
Can I fix a leaking faucet myself?
Yes, most drips are a 20-minute swap of a part costing a few dollars. Shut off the supply valves under the sink first, then match the old cartridge or washer exactly. It needs no special skill, just the right replacement piece.
How do I know if it’s the cartridge or the O-ring?
Watch where the water comes from. A drip from the spout tip after the handle’s off is the cartridge or washer. Water seeping around the base while it runs is a worn O-ring or a loose packing nut.
Should I repair or replace a leaking bathroom faucet?
Repair it if the body is sound and the part is available, since a cartridge costs far less than a fixture. Replace it when the body is cracked, the finish is corroding, or a decade-old faucet has seized nuts that break during repair.
What tools do I need to fix a leaking faucet?
An adjustable wrench, a screwdriver, plumber’s grease for O-rings, and the exact replacement part. A cartridge-pulling tool helps on stuck cartridges. Always bring the old part to the store to match it precisely.
Bottom Line
For most bathroom faucets, the leak traces to one cheap part: a cartridge or washer if it drips from the spout, an O-ring if it seeps at the base. Shut off the water, pull the old piece, and match it exactly, and the drip stops for years. When the faucet body itself is cracked or corroding or the mounting nuts are seized solid, replace the whole fixture rather than chasing a repair that won’t hold.
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